126 lines
3.9 KiB
Ruby
126 lines
3.9 KiB
Ruby
# frozen_string_literal: true
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# == Schema Information
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#
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# Table name: settings
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#
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# id :bigint(8) not null, primary key
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# var :string not null
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# value :text
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# thing_type :string
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# created_at :datetime
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# updated_at :datetime
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# thing_id :bigint(8)
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#
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# This file is derived from a fork of the `rails-settings-cached` gem available at
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# https://github.com/mastodon/rails-settings-cached/tree/v0.6.6-aliases-true, with
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# the original available at:
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# https://github.com/huacnlee/rails-settings-cached/tree/0.x
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# It is licensed as follows:
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# Copyright (c) 2006 Alex Wayne
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# Some additional features added 2009 by Georg Ledermann
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOa AND
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# NONINFRINGEMENT. IN NO EVENT SaALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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class Setting < ApplicationRecord
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after_commit :rewrite_cache, on: %i(create update)
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after_commit :expire_cache, on: %i(destroy)
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# Settings are server-wide settings only, but they were previously
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# used for users too. This can be dropped later with a database
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# migration dropping any scoped setting.
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default_scope { where(thing_type: nil, thing_id: nil) }
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class << self
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# get or set a variable with the variable as the called method
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# rubocop:disable Style/MissingRespondToMissing
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def method_missing(method, *args)
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# set a value for a variable
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if method.end_with?('=')
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var_name = method.to_s.chomp('=')
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value = args.first
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self[var_name] = value
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else
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# retrieve a value
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self[method.to_s]
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end
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end
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# rubocop:enable Style/MissingRespondToMissing
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def cache_prefix_by_startup
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@cache_prefix_by_startup ||= Digest::MD5.hexdigest(default_settings.to_s)
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end
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def cache_key(var_name)
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"rails_settings_cached/#{cache_prefix_by_startup}/#{var_name}"
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end
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def [](key)
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Rails.cache.fetch(cache_key(key)) do
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db_val = find_by(var: key)
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db_val ? db_val.value : default_settings[key]
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end
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end
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# set a setting value by [] notation
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def []=(var_name, value)
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record = find_or_initialize_by(var: var_name.to_s)
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record.value = value
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record.save!
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end
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def default_settings
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return @default_settings if defined?(@default_settings)
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content = Rails.root.join('config', 'settings.yml').read
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hash = content.empty? ? {} : YAML.safe_load(ERB.new(content).result, aliases: true).to_hash
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@default_settings = (hash[Rails.env] || {}).freeze
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end
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end
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# get the value field, YAML decoded
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def value
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YAML.safe_load(self[:value], permitted_classes: [ActiveSupport::HashWithIndifferentAccess, Symbol]) if self[:value].present?
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end
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# set the value field, YAML encoded
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def value=(new_value)
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self[:value] = new_value.to_yaml
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end
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def rewrite_cache
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Rails.cache.write(cache_key, value)
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end
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def expire_cache
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Rails.cache.delete(cache_key)
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end
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def cache_key
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self.class.cache_key(var)
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end
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def to_param
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var
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end
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end
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